To celebrate the upcoming 20 year anniversary of his Grammy Award-winning hit single "Baby Got Back," veteran rapper Sir Mix-a-Lot is releasing a smartphone app.

A description of the "Baby Got Back" app: Sir Mix-a-Lot's Baby Got Back app comes fully-packed with a buttload of hands-on features including the Mix Makeover photo lab, the Ba Dunka Dunk club game, Sir Mix-a-Lot's Booty Calls, a social media Text Mix and more.

The Sir Mix-a-Lot app won't be released until May, but the app can be purchased now on iTunes here.

Check out the  original "Back Got Back" video below:

[youtube:http://youtu.be/k4he79krseU]